Answer:
The power of the distance is -1.
Explanation:
The equation for the electric potential of a point charge is given by 
where V is the electric potential, k is Coulomb's constant (it has a value of 
with units 
), q is the electric charge of the small charge and r is the distance from the charge.
Now, the power of a number is how many times we multiply that number by itself; we see r appears only once in the equation. So we know the power is 1. But we can see in the equation that k and q are divided by r, which means r is the denominator. This means the power of r is negative (-).
Therefore, the power of r is -1.
~Hello there!
Your question: Which of two factors influence the weight of an object due to gravitational pull?
Your answer: The mass and the radius of the planet are the two factors that influence the weight of an object due to the gravitational pull
The answer is option A.
Any queries ^?
Happy Studying!
Answer:
Velocity= 19.05 m/s
Kinetic energy= 3.08 J
Explanation:
The corn possess potential energy. Feom law of conservation of energy, all the potential eneegy will be converted to kinetic energy, with negligible friction.
Potential energy, PE= kinetic energy, KE
Potential energy is given by mgh while kinetic energy is given by 
Equating
Making v the subject of the formula then
Substituting 9.81 m/s2 for g and 18.5 m for h then the velocity will be
To get the kinetic eneegy, since PE=KE AND KE is
Substituting v with 19.05 and m with 0.017 kg we have
This can also be achieved by mgh since PE=KE hence 0.17*9.81*18.5=3.085245 J and the results are slightly different due to small energy losses and rounding off of values.
